12777605788 has 12 divisors (see below), whose sum is σ = 22390910640. Its totient is φ = 6380202752.

The previous prime is 12777605779. The next prime is 12777605801. The reversal of 12777605788 is 88750677721.

It is a super-2 number, since 2×12777605788² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146693 + ... + 2152636.

It is an arithmetic number, because the mean of its divisors is an integer number (1865909220).

Almost surely, 2^12777605788 is an apocalyptic number.

It is an amenable number.

12777605788 is a deficient number, since it is larger than the sum of its proper divisors (9613304852).

12777605788 is a wasteful number, since it uses less digits than its factorization.

12777605788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300076 (or 4300074 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 58.

The spelling of 12777605788 in words is "twelve billion, seven hundred seventy-seven million, six hundred five thousand, seven hundred eighty-eight".